Insulator rack



March 3, 1931. R. M. KERSCHNER INSULATOR RACK Filed Feb. 24. 1928 Patented Mar. .3, 193914.

.RIICHARDllI. KEESCI-INER, F PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 HUBBARD 8a COMPANY, A CGEIORATION OF PENNSYLVANIA INSULA'I'OR RACK Application filed February 24,1928. Serial No. 256,577.

This invention relates to insulator racks and more particularly to a method of making the same.

Insulator racks generally comprise a base member having insulator pin supports fixed thereto. The methods that have heretofore been employed for making insulator racks, such aslap-welding or riveting the pin supports to the base, are undesirable in view of the pickling and galvanizing processes to corrosion and weakening of the joints, also. 1t 1s very dnficult to obtain. a complete lap weld to the extent that the adjacent surfaces are free from cracks or openings betweenthe joints, this causes the same result as the rivetingjoints. Lap-weldingis further undesirable in view of the base radiating the welding heat sorapidily that the welding process is retarded. V I r c An object of this invention is to provide a metal insulator rack base having integral projections at the points where it is desired to Weld the pin supports that shall prevent the necessity of applying the vwelding heat to the main base portion.

Another ob ect of this lnvention 1s topro vide a method of making insulator racks that Y shall be so constructed as toreducethe rad1a- Cit tion of welding heat applied thereto and thereby render the method of welding pin supports to the base member more efficient and expedient. r

and combination of parts'thatwill be made apparent throughout the further description of the device illustrated in the accompanying drawings and set forth 1n the appended claims. 7 a a Another object of this invenion is to pro -ln the drawings rack'constructed in accordance with the present method, and

Fig. 2 isa similar view to Fig. 1v having Fig. 1 is a perspective view of an insulator the insulator pin and pin supports removed.

The present method consists in stamping from a piece of sheet metal, a base 1l"(see F g.2). Thisba'se 11 1s formed by a single "stampingintc the shape of a 'channel. having 3 its sides terminatmg 1n outwardly extending flanges 15 and "16, simultaneously with the forming of the sheet metal base.- The channel portion is punched to provide a plurality of'spaced openings 17 and a plurality. of

spaeedopenings 18, the openings 18 having Either of the openings 17 or 21 may be employed with suitable means such as clamping. bolts and nuts for fastening the-rack to a wall, roof or the like. The channel portion.

adjacent the openings21 is'curved inwardly,

as shown at 22, for permitting free access'to such clamping means ascmay be employed with the openings 21. y

Y TheopeningslS having annular fiange like struck-up portions 19, area very important feature of this invention and willhereinafter be descrlbed in connection wlth the pin supports 12.

"The pin supports 12 are also preferably stamped from sheet metal and bent upon themselves, formlng two legs 23 and 24 havingtheir ends ending'adjacent, one to the other, The s1des of the legs 23 and 2d are provided with inwardly turned flanges 25- and 26.- The ends of these flanges 25 and 26,

together fNl'tllftllQGllClS of the main portions of the legs are adapted to conform with and rest upon the struck-up portions 19, at which time the pin supports 12 maybe welded to the struclnup portions 19,

annular flange like struck-up portions 19 in c. 1 pm 13 havmg insulators 1 L d1sposed thereon.

The pin supports are so formed at their tops as to provide a cylindrical opening 27 for receiving the insulator pin 13.

I have found through practice, that in providing the struck-up portions 19 and welding the pin supports 21"to such struck-up portions, instead of welding the pin supports 12 directly to the base 11, that theradiation of the welding heat is considerably lessened so much so that a more etiicient weld is obtained and much time is saved in the operation.

It can be seen from the above that the struck-up portions 19 limit the radiating surface of the metal base 11, whereas, as has been the practice heretofore, to weld the pin supports directly to the base 11, that it is V necessary to apply the welding heat directly to the base which conducts the head from the point desired very rapidly so much so that in many instances a proper weld is not obtained and much time is lost in the operation.

\Vhile I have illustrated and described this invention in connection with a base member having struckup portions for welding pin supports thereto, it will be apparent to those skilled in the art that certain changes, modifications, substitutions, additions and omissions may be made in the invention without departing from the spirit and scope of the appended claims.

hat I claim as new and desire to secure by Letters Patent is: v

1. As a new article of manufacture, an insulator rack having a channel base with its sides terminating in outwardly extending flanges, spaced elongated openings in the said flanges, an incurved portion in the channel portion adjacent the said elongated openings and spaced pin supports welded to the said channel portion.

2. As a new article of manufacture, an 111- sulator rack having a channel shaped base member, a plurality of spaced openings therein and aplurality of rectangular openings therein, the said rectangular openings having integral rip-standing continuous fiangesadjacent the edges thereof and a pin support bent upon itself so as to position its ends adjacent, one to the other, the ends of the said pin support being welded to the said lip-standing flange.

In testimony whereof, I have hereuntosubscribed my name this 15th day of February,

' RICHARD M. KERSCHNER. 

